My P3S hovered 10 ft away and about 3.5-4 ft in the air and was about to take off until the drone full speed comes right for me. Hit me in the chest. It stung a little but was worried about the drone. The drone was inverted and motors still spinning on a road right next to me, I picked it up and let it hover back up. I checked the flight logs back and the whole time the drone was in P-GPS the whole time which makes me wonder what happened. The worst damage was the top of the props being sanded down. Anyone have any ideas on what could've happened?

I think your drone has a poltergeist in it and it doesn't like you.  

I think your drone has a poltergeist in it and it doesn't like you.  No idea how that could happen unless your sticks were being used.  Did it reverse into you?

..... next thing you'll be suggesting it was a woman driver

Do as I do put it at 10 ft alt so you have no worrys

Maybe some used a drone wifi hack?  Yes it does exist....
https://github.com/samyk/skyjack

What can you say about the launch site?  Was it reinforced concrete?